Southern EPR-Segment J

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  • Country
  • Subregion Name
  • Primary Volcano Type
  • Last Known Eruption
  • 18.175°S
  • 113.35°W

  • -2650 m
    -8692 ft

  • 334130
  • Latitude
  • Longitude

  • Summit

  • Volcano

There are no activity reports for Southern EPR-Segment J.

 Available Weekly Reports

There are no Weekly Reports available for Southern EPR-Segment J.

Summary of eruption dates and Volcanic Explosivity Indices (VEI).

Start Date Stop Date Eruption Certainty VEI Evidence Activity Area or Unit
1890 (?) Unknown Confirmed 0 Magnetism
1820 (?) Unknown Confirmed 0 Magnetism

The following references are the sources used for data regarding this volcano. References are linked directly to our volcano data file. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title. Additional discussion of data sources can be found under Volcano Data Criteria.

Bowles J, Gee J S, Kent D V, Bergmanis E, Sinton J, 2005. Cooling rate effects on paleointensity estimates in submarine basaltic glass and implications for dating young flows. Geochem Geophys Geosyst, 6: Q07002, doi:10.1029/2004GC000900.

Sinton J M, Smaglik S M, Mahoney J J, Macdonald K C, 1991. Magmatic processes at superfast spreading Mid-Ocean Ridges: glass compositional variations along the East Pacific Rise 13°-23° S. J Geophys Res, 96: 6133-6155.

Sinton J, Bergmanis E, Rubin K, Batiza R, Gregg T K P, Gronvold K, Macdonald K C, White S M, 2002. Volcanic eruptions on mid-ocean ridges: new evidence from the superfast spreading East Pacific Rise, 17°-19° S. J Geophys Res, 107: 2115, doi:10.1029/2000JB000090.

The axial crest of Segment J of the Southern East Pacific Rise consists of an asymmetrical shallow graben varying from 250 to 600 m wide with walls about 20 m high. Horst and graben structures expose cooled lava lakes and both active and extinct hydrothermal chimneys. Basaltic lava flow fields, lava pillars, and pillow mounds are found on the floor of the graben. The largest lava flow field is the Moai lava flow at about 18 deg 12 min S. Two lava flows in Segment J have been dated by paleomagnetic evidence at about 1820 and 1890 AD.